First off let me say I'm pretty much a newbie when it comes to Jeeps. I had a CJ a few years ago, but never had to do much work on it. So be patient if I ask stupid questions.

Anyhow, I've got an '86 Waggy, 2.8l, auto. Stock front (D30) and rear (D35), 3" lift 30X9.5 tires. Over the past couple of weeks I've noticed a tapping/knocking noise coming from the front end. I haven't been able to pinpoint it to one side or the other, but I know it's not engine knock. It gets faster as speed increases, and is most noticeable at lower speeds, especially when slowing down/braking (it is not louder during braking as compared to slowing down)...not so much during acceleration, but it could be engine noise canceling out the tap. The other day I put it in 4wd to see if it makes the noise, and it does not. However when I put it back in 2wd, it seems to have made the noise louder.

My thoughts are front axle u-joints, or something with the T-case itself.

Any thoughs as to what I should be looking for, or ideas how to further narrow down what the problem is? I haven't really looked at anything yet, so I'm just trolling for ideas right now.

Since it's coming from the front end, my guess would be the u-joints at the wheels.

You can also check to see if one of the front wheels is very hot after driving (compared to the others). Generally the only two things that will get it hot are wheel bearings and a non-releasing caliper. With the front end in the air, grab and wiggle the wheel, there should be NO movement. If there is, the bearing is letting go. You can also look for any bits of bright shiny metal around the steering knuckle, which will indicate if the bearing is self-destructing. The unit bearings are expensive (~$125 apiece) so you want to be sure that's the problem before you replace them.

Like I said at the top I would suspect the u-joints are the culprit though.

HTH

Steve_________________97 XJ Sport with a bunch of stuff

Quote:

Never argue with idiots, they drag you down to their level and beat you with experience